It would be a challange to find one equation that fits all of these values. However It is certainly possible to use a series of quadratic type equations to create a smooth line between these sets of points. This would enable us to work out the likely values at any point between the start and the end of the series although it would depend on the level of smoothing. If one was wanting to then project the line further in order to predict the next likely value this might be possible as long as it is not too far away from the last value.
__________________ The future ain’t what it used to be. Yogi Berra.
